1. Alfonso-Faus, A.: Fractal universe and the speed of light: Revision of the universal constants. New Adv. Phys. 2(2), 109–113 (2008a). arXiv:0905.3966
2. Alfonso-Faus, A.: Entropy in the universe: a new approach. Entropy 2, 168–171 (2008b). www.mdpi.org/entropy/
3. Alfonso-Faus, A.: Structure of the universe: generalization of Weinberg’s relation. arXiv:0805.4762 (2008c)
4. Alfonso-Faus, A.: The speed of light and the Hubble parameter: the mass-boom effect. In: 9th Symposium on “Frontiers of Fundamental Physics. AIP Conf. Proc., vol. 1018, pp. 86–93, 7–9 Jan. 2008, University of Udine, Italy (2008d). arXiv:0710.3039
5. Alfonso-Faus, A.: The speed of light and the Hubble parameter: the mass-boom effect. Astrophys. Space Sci. 315, 25–29 (2008e)